Trigger Output Test; External Trigger Mode (Slow) Test; Trigger Output Test Setup; External Trigger Mode (Slow) Test Setup - HP 8081A Operating And Service Manual

4-8
TRIGGER OUTPUT TEST
3.
Measure Ampl itude, Baseline and Duty Cycle.
SPECIFICATION
Trigger Output Pulse ,-.6V
±
50mV
to OV ± 50mV
Duty Cycle 50 % ± 10 %
I-t
on
J-t
Off-J
Baseline
DESCRIPTION
The trigger output pu Ise parameters are tested.
Amplitude should be . , 6V
±
50mV
Baseline should be OV ± 50mV
Duty Cycle shou Id be 50 %
~
10 %
ton
x 100%
period
4-9 EXTERNAL TRIGGER MODE
(SLOW) TEST
Duty cycle
=
o
SAMPUNG
OSCI LlOSCOPE
D
01
8080A MAINFRAME 80S1A
Figure 4-2. Trigger Output Test Setup
SPECI FICATION
EQUIPMENT
The repetition rate output is controlled externally. The
trigger and internal outputs are pulse-shaped versions of
the trigger input.
Sampling oscilloscope HP 182C Mainframe
with 1810A plug-in
DESCRIPTION
PROCEDURE
1. Set up the equipment as shown in figure 4-2 and
set the controls as follows:
The function of the Model 8081 A is tested in external
trigger mode using an external sinewave generator to
apply a trigger signal of 10KHz.
so
OHM
TERL4lNATlON
,
REI>,L TIME
OSCILI,OSCOP~
RATE range 300MHz-100MHz
Rate V ERN I ER , .. , , CW
Operating Mode switch NORM
NEG-POS-MAN switch POS
8081A:
Oscilloscope
50QHM T£~
2.
Sensitivity .. , 200mV/div
Trigger internal
Timebase mode expanded
Timebase - direct 20ns/div
Timebase - expanded 2ns/div
Set Frequency to 100MHz on screen using Rate
VERNIER.
Figure 4-3. External Trigger Mode (Slow) Test Setup
EQUIPMENT
Oscillator , HP 651 B
Real Time Oscilloscope HP 182C Mainframe
with 1804A and 1821 A plug-ins
50 Ohm Feedthru Termination HP 10100C
/